Rain Bombs

 

http://www.bloomberg.com/news/articles/2016-07-29/forget-tornadoes-rain-bombs-are-coming-for-your-town

http://youtu.be/a_G2KRzha7o

http://www.youtube.com/watch?v=Mj97Rd654YE&sns=em

http://www.youtube.com/watch?v=DIehsOQN10k&sns=em

https://www.hindawi.com/journals/ijge/2011/971302/